In Xcode 7.1 Simulator, when using ⌘+s
to save screenshot to desktop, it saves the actual size of the simulator. For example, iPhone 6 Plus 100%
sc
@SamSol's answer may work for earlier versions of Xcode, but the debug window does not appear to be present in Xcode 11+.
Instead, I followed this suggestion from the Apple Developer forum:
The saved output image should have the desired resolution to be included on the Apple App Store.